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Optimization of Enzyme Treatment Condition for Clarification of Pomegranate Extract  

Kim, Seong-Ho (Department of Herb & Food Science, Kyungpook College of Science)
Kim, In-Ho (Bio-Health Industrial Institute, Kyungpook College of Science)
Cha, Tae-Yang (Bio-Health Industrial Institute, Kyungpook College of Science)
Kang, Bok-Hee (Bio-Health Industrial Institute, Kyungpook College of Science)
Lee, Jin-Hyung (Department of Microbiology, Kyungpook National University)
Kim, Jong-Myung (Department of Microbiology, Kyungpook National University)
Song, Kyung-Sik (College of Agriculture and Life Sciences, Kyungpook National University)
Song, Bang-Ho (Department of Biology Education, Kyungpook National University)
Kim, Jong-Guk (Department of Microbiology, Kyungpook National University)
Lee, Jin-Man (Department of Herb & Food Science, Kyungpook College of Science)
Publication Information
Applied Biological Chemistry / v.48, no.3, 2005 , pp. 240-245 More about this Journal
Abstract
Response surface methodology was used to investigate clarification characteristics (turbidity, brown color, soluble solid, total sugar and reducing sugar) of enzyme in pomegranate extract. Enzyme was treated at 16 conditions including independent variables of temperature ($35{\sim}55^{\circ}C$), time ($30{\sim}70\;min$) and concentration ($0.02{\sim}0.10%$) based on central composition design. Turbidity was decreased with increase of enzyme concentration, and the minimum value of turbidity was 0.04 (OD) when 0.08% enzyme was treated at $37.99^{\circ}C$ for 60.90 min. Total sugar was affected by all treatment conditions and the maximum value was 8.37% when 0.03% enzyme was treated at $39.28^{\circ}C$ for 42.04 min. Reducing sugar and soluble solid were largely affected by enzyme concentration, and the maximum value of reducing sugar was 7.22% when 0.02% enzyme was treated at $42.96^{\circ}C$ for 46.21 min. The maximum value of soluble solid was 8.13% when 0.02% enzyme was treated at $46.91^{\circ}C$ for 42.13 min.
Keywords
pomegranate; enzyme; clarification; turbidity; RSM;
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